OCPBUGS-35189:fixing typo

Author: Brendan Daly

modules/running-cluster-oci-agent-based.adoc

@@ -13,7 +13,7 @@ To run a cluster on {oci-first}, you must upload the generated agent ISO image t
 {oci} supports the following {product-title} cluster topologies:
 
 * Installing an {product-title} cluster on a single node.
-* A highly-availabile cluster that has a minimum of three control plane instances and two compute instances.
+* A highly available cluster that has a minimum of three control plane instances and two compute instances.
 * A compact three-node cluster that has a minimum of three control plane instances.
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